Omnimed 1 flip open binder inch Poly binders are made of a molded hospital grade tri-polymer material for strength and flexibility. Equipped with our patented twin-hinge system and heavy duty rings, sheets are easily added and secured in the binder. These binders are warranted to last and can withstand the hardest use without ripping or ring failure. They are easy to clean and are available in a variety of fade-resistant colors to compliment your office or home needs. Each binder can accommodate up to 175 Plus sheets and measures 13 3/8H x 9 1/8W x 1 5/8D.